CPU overclocked from (1x) 150Mhz (1.1v) to (2x) 300Mhz (1.2v), possibly to (3x) 460Mhz (1.5v) – other have driven the RP2350B to over 600Mhz (2v).
DeMon has 16MB flash, 8MB PSRAM (GPIO-8), it uses these to boot SticKey (RP2354B), Jazz (RP2350B), program Razz (FPGA), simulate the SD card from the SG2002. FRAM is accessed via GPIO-0.
This will connect to the SWD port of the “SticKey” chips and “Razz” chip. This will allow it to program those components with their firmware (if it needs updating) and provide hardware debugging for any of the components.
Debug streams will also be sent back from each component and then to the “main processing unit”.
It will be able to reset any of the components remotely. The debug monitor will also control the boot state and act as a watchdog for the SG2002 “main processing unit”.
DeMon can act as an SPI slave for the SG2002, it emulates an SD card interface.
The DeMon is actually a RP2350B chip that has connections to the hardware debug ports of the other chips.
USB host for keyboard, mouse, joypad.
The real-time clock chip is the Microchip MCP74910 (64 bytes battery backed SRAM, 128 bytes EEPROM, 8 bytes protected EEPROM, supports 2001 to 2399).
DeMon has 8MB PSRAM available.
An ESP-C5-WROOM-1-N8R4 chip will be connected to DeMon. This will bring 2.4Ghz/5Ghz Wifi (802.11b/g/n/ax), Thread 1.3, Zigbee 3.0 and Bluetooth 5.3 (LE) and Bluetooth mesh, with RGB status light, Remote "debrick", FRAM interface 3.
Debugging will be supported via the ESP32's USB-C (12mbps), Wifi (2.4Ghz, router needed, up to 54mbps), Bluetooth (2mbps) or ESP Now (2.4Ghz/5Ghz, no router needed, 1mbps), or 62.5Mbps over SPI (in practice this may be closer to 10mbps).
Optional Waveshare Core1262 HF LoRa Module (SX1262) for possible LoraWAN or/and Meshtastic use, with RGB status light.
An internal micro SD card provides 256GB (default, replaceable) internal storage.
| Start address | End address | Size | Description |
|---|---|---|---|
| 000000 | 3FFFFF | 400000 | 4MB SRAM |
| 040000 | 7FFFFF | 400000 | Reserved |
| GPIO | Function | GPIO | Function |
|---|---|---|---|
| 0 | FRAM | 29 | RX0 - from Razz |
| 1 | SPI0 CSn - JTAG TMS | 30 | Jazz/SticKey RUN (hi = on, lo =off) |
| 2 | SPI0 SCK - JTAG TCK | 31 | Jazz SWD IO (SM0) |
| 3 | SPI0 TX/MOSI - JTAG TDO | 32 | Jazz/SticKey SWD CLK (SM0) |
| 4 | SPI0 RX/MISO - JTAG TDI to Razz | 33 | SticKey SWD IO |
| 5 | Razz Reconfig | 34 | sticKey interrupt |
| 6 | Razz Ready | 35 | razz interrupt |
| 7 | Razz Done | 36 | I2C0 interrupt Round touch/cart IRQ |
| 8 | PSRAM CSn | 37 | I2C1 interrupt Debug touch/RTC |
| 9 | Handshake - ESP-C5 GPIO8 | 38 | LCD + TOUCH RESET |
| 10 | ESP-C5 EN pin (switch on/off wifi) | 39 | LCD CMD/DATA |
| 11 | Boot mode ESP-C5 GPIO28 (autoprogram) | 40 | SPI1 SEL0 |
| 12 | TX0 (or PIO UART) ESP-C5 GPIO12 (RX) | 41 | SPI1 SEL1 |
| 13 | RX0 (or PIO UART) ESP-C5 GPIO11 (TX) | 42 | SPI1 SEL2 |
| 14 | TX0 (or PIO UART) – to SG2002 | 43 | SPI1 TX/MOSI ESP-C5 GPIO23 |
| 15 | RX0 (or PIO UART) – from Jazz | 44 | SPI1 RX/MISO ESP-C5 GPIO15 |
| 16 | PWM 0A - Buzzer | 45 | SPI1 CSn– multiplexer CS out |
| 17 | "DeMon" button input | 46 | SPI1 SCK - touch screen / ESP-C5 GPIO9 |
| 18 | I2C1 SDA – RTC (68) / touch debug (70) / sg2002 (56) | 47 | PWM 11B LED light |
| 19 | I2C1 SCL – RTC / touch debug / Sg2002 | SWDIO | ESP32-C5 GPIO26 |
| 20 | SPI0 (SG2002 slave) RX/MOSI SD emulation | SWDCLK | ESP32-C5 GPIO25 |
| 21 | SPI0 (SG2002 slave) CSn | ADCREF | |
| 22 | SPI0 (SG2002 slave) SCK | 3V3 | |
| 23 | SPI0 (SG2002 slave) TX/MISO | BOOTSEL | DeMon (unbrick) button, also goes to "DeMon" button input |
| 24 | I2C0 SDA - round touch / Cart SDA | USB D- | Debug |
| 25 | I2C0 SCL - round touch / Cart |SCL | USB D+ | (12Mbps) |
| 26 | Cartridge DETECT (CD) | RUN | Hardware reset button to 3v3 |
| 27 | RX1 (or PIO UART) Cartridge NFC TX | 3V3 EN | |
| 28 | Neopixel data (6 LEDs) | VBUS |
Using SPI1, and different CSn lines, DeMon controls:
| Value | Selected Device |
|---|---|
| 0 | ESP32-C5 GPIO 10 |
| 1 | Razz |
| 2 | Jazz |
| 3 | SticKey |
| 4 | Cartridge |
| 5 | Round TFT |
| 6 | Touch TFT |
| 7 | Internal micro-SD |
| Pin | Function | Pin | Function |
|---|---|---|---|
| 1 | GND | 28 | GND |
| 2 | 3v3 | 27 | IO26 - DeMon SWD IO |
| 3 | EN - DeMon GPIO12, resistor to gnd | 26 | IO25 - DeMon SWD CLK |
| 4 | IO2 - FRAM/SX1262 MOSI (set to 1 via resistor = 48Mhz crystal) | 25 | IO11 - TX to DeMon RXD |
| 5 | IO3 - SX1262 DIO1 (set to 0 via resistor = 3.3v flash) | 24 | IO12 - RX to DeMon TXD |
| 6 | IO0 – FRAM CS (set to vcc via resistor) | 23 | IO23 - DeMon Handshake |
| 7 | IO1 – SX1262 Busy | 22 | NC |
| 8 | *IO6/SPI CLK - SX1262 SCK | 21 | IO15 - DeMon SPI MISO |
| 9 | *IO7/SPI D (MISO) - SX1262 MISO | 20 | NC |
| 10 | IO8 – DeMon SPI MOSI | 19 | NC (using internal PSRAM) |
| 11 | IO9 – DeMon SPI CLK | 18 | IO27 – SX1262 CS (set to vcc via resistor) |
| 12 | *IO10/SPI CS0 (IN) DeMon CS | 17 | *IO4 – MTCK/SPI HD |
| 13 | IO13 – SX1262 Reset | 16 | *IO5 – MTDO/SPI WP |
| 14 | IO12 - SX1262 TX/RX EN | 15 | IO28 - (in) auto-program (Demon GPIO13, set to 1 via resistor) |
| Start address | End address | Size | Description |
|---|---|---|---|
| 000000 | 3FFFFF | 400000 | 4MB SRAM |
| 040000 | 7FFFFF | 400000 | Reserved |
A 24-pin edge connector cartridge port (37mm 2.54 pitch wide) is connected to DeMon. If present, then this is booted in preference to the SD card slot. If a cart is inserted or swapped whilst powered on, the Ant64 will normally automatically be rebooted to it (this can be disabled in options). However, a cartridge can safely be removed whilst powered on and the Ant64 will not reboot, reinserting the same cartridge will also not reboot.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| GND | IRQ | 3.3V | SCL | CS | TX/MOSI | RX/MISO | CLK | SDA | CD | 5V | GND |
| GND | 5V | CD | SDA | CLK | RX/MISO | TX/MOSI | CS | SDL | 3.3V | IRQ | GND |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
Pins 0/15, and 11/20 on the cartridge will extend further than others.
| No | Name | Description |
|---|---|---|
| 0 | Power | Off, white during self test, then amber during boot, green when fully booted |
| 1 | Internal micro SD | None=off, blue = detected, green = read/write, red = error |
| 2 | Cartridge (SD) | None=off, blue = detected, green = read/write, red = error |
| 3 | Main (fast) SD | None=off, blue = detected, green = read/write, red = error |
| 4 | Network | None=off, blue = connected, green = read/write, red = error |
| 5 | WiFi | None=off, blue = connected, green = read/write, red = error |
The ESP32 can unbrick DeMon remotely over wifi or via the USB-C power port (whilst pressing the "DeMon" button at power up).
Important: The Ant32 and Ant64 are both still at early design and prototype stage, everything you see here is subject to change.